SiempreTuna
Android Expert
Not sure why people don't have the straight to navigation icon: it's still there in my App drawer and I just checked and it still works, taking me direct to tne new navigation screen - could it be related to 4.3 
Somewhat ironically, I never use the navigation icon and didn't have it on my home screen before the upgrade ..
As for maps error-ing, that sounds like some kind of incompatibility. Assuming it's not an incompatibility with your version of Androids (a bit of a rash assumption
), I think I would back everything up, do a factory reset, get maps back up to date if required, then try it again BEFORE installing anything else.
Assuming maps then works, I would start adding my apps back, one or two at a time, trying things for a day before adding back more apps .. until maps stops working. Then you have a pretty good idea which app to avoid.
If you don't want go through all that, you could try using something like OsmAnd until Google sort their .. stuff .. out

Somewhat ironically, I never use the navigation icon and didn't have it on my home screen before the upgrade ..
As for maps error-ing, that sounds like some kind of incompatibility. Assuming it's not an incompatibility with your version of Androids (a bit of a rash assumption
), I think I would back everything up, do a factory reset, get maps back up to date if required, then try it again BEFORE installing anything else.Assuming maps then works, I would start adding my apps back, one or two at a time, trying things for a day before adding back more apps .. until maps stops working. Then you have a pretty good idea which app to avoid.
If you don't want go through all that, you could try using something like OsmAnd until Google sort their .. stuff .. out
